cidr

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Classless Inter-Domain Routing See RFC1519; cf variable length subnet mask

Classless Inter-Domain Routing

A method for creating additional addresses on the Internet, which are given to Internet service providers (ISPs) that in turn delegate them to their customers CIDR reduces the burden on Internet routers by aggregating routes so that one IP address represents thousands of addresses that are serviced by a major backbone provider All packets sent to any of those addresses are sent to the ISP such as MCI or Sprint In 1990, there were about 2,000 routes on the Internet Five years later, there were more than 30,000 Without CIDR, the routers would not have been able to support the increasing number of Internet sites

Classless Inter-Domain Routing cf variable length subnet mask

Classless InterDomain Routing

See: Classless Inter-domain Routing

Classless interdomain routing, a technique supported by BGP-4 that allows routers to group routes together in order to reduce the amount of routing information overhead With CIDR, several IP networks' traffic appears to networks outside the group as a single, large entity

An address scheme that allows routers to group routes together to reduce the amount of routing information overhead

Classless Inter-Domain Routing: CIDR allows the traditional barriers of class based addressing to be broken, and addresses to be allocated in blocks of any power of two UUNET allocates in blocks down to 16 hosts, of which one is the subnet address and one is the broadcast address for the subnet, leaving 14 usable hosts

Classless InterDomain Routing Technique supported by BGP4 and based on route aggregation CIDR allows routers to group routes together in order to cut down on the quantity of routing information carried by the core routers With CIDR, several IP networks appear to networks outside the group as a single, larger entity With CIDR, IP addresses and their subnet masks are written as 4 octets, separated by periods, followed by a forward slash and a 2-digit number that represents the subnet mask See also BGP4

CIDR is Classless InterDomain Routing This allows for the traditional barriers of class based addressing to be broken, and addresses to be allocated in blocks of any power of 2

IETF standard for combining a contiguous block of Class C subnets to achieve a greater mass of addresses

Classless interdomain routing, a technique supported by BGP-4 allowing routing routing between multiple independent networks, without the old notion of subnet 'classes' (e g Class 'C' network space)